Remark 2 
We underline that the above definitions can be naturally extended to the partial concepts setting. For instance, we say that \(\mathcal {H}\subseteq \lbrace 0,1,\star \rbrace ^\mathcal {X}\) 
VC-shatters a set \(S\)  if every binary pattern is realized by some \(h \in \mathcal {H}\) . For further details, see [1]}.

